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San Francisco gartersnake fecundity data from San Mateo County, California collected from 2019-2022

Published by U.S. Geological Survey | Department of the Interior | Catalog Last Checked: August 01, 2026 at 04:42 AM | Dataset Last Updated: October 05, 2023 at 12:00 AM
Adult female San Francisco gartersnakes (Thamnophis sirtalis tetrataenia) were captured and examined using an ultrasound device to determine if they were gravid and count the number of embryos in those that were. Morphological data including length and mass were collected for each snake, along with the date of capture and a study site identifier.

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